Nodejs Array Object Key by( key, id )

Method Source Code

Array.prototype.by = function( key, id )
{
  var index = this.length;
  while( index-- )
  {//  ww w  . j  a  v a2  s.  c o m
    if( this[ index ][ key ] == id ) {
      return this[ index ];
    }
  }
};

Related

1. addIfUnique(key, value)

   Array.prototype.addIfUnique = function(key, value)
     if(this.contains(key))
       this[key] = value;
     else
       this.push(key);
       this[key] = value;
   

2. changeItem( key, property, value )

   Array.prototype.changeItem = function( key, property, value )
     var done = false;
       for(var i = 0; i < this.length; i++)
           if( this[i]["id"] == key)
             this[i][property] = value ; done = true;
       return done;
   };
   

3. containsProp(key,str)

   Array.prototype.containsProp = function(key,str) {
     var i = this.length,
       holder = [];
     while (i--) {
       if (this[i][key] === str) {
         holder.push(this[i]);
     return holder;
   ...
   

4. containsReturn(key, value)

   Array.prototype.containsReturn = function(key, value) {
       var i = this.length;
       while (i--) {
           if (this[i][key] === value){
               return i;
       return false;
   

5. getKeys()

   Array.prototype.getKeys = function(){
     var keys = '';
     for(var i in this) keys += ',' + i;
     return keys.substr(1).split(',');